fix: improve dev-build-ai-plugin working directory handling

Fix directory navigation in Makefile to ensure bin directory creation
and plugin binary copying works correctly.

Author: KariHall619

tools/make/run.mk

@@ -30,9 +30,9 @@ build-ai-plugin:
 dev-build-ai-plugin:
 	@echo "🔧 Building AI plugin for development..."
 	@if [ -d "$(AI_PLUGIN_DIR)" ]; then \
-		cd $(AI_PLUGIN_DIR) && make build; \
+		cd $(AI_PLUGIN_DIR) && make build && cd - > /dev/null; \
 		mkdir -p bin; \
-		cp $(AI_PLUGIN_DIR)/bin/atest-ext-ai bin/; \
+		cp -f $(AI_PLUGIN_DIR)/bin/atest-ext-ai bin/atest-ext-ai; \
 		if [ -f ~/.config/atest/bin/atest-ext-ai ]; then \
 			mv ~/.config/atest/bin/atest-ext-ai ~/.config/atest/bin/atest-ext-ai.backup; \
 			echo "✅ Backed up system version, now using development version"; \